Abdomen developing exerciser



FIG. 1 is a perspective view showing the new design for an abdomen developing exerciser;

FIG. 2 is an enlarged front view thereof;

FIG. 3 is an enlarged rear view thereof;

FIG. 4 is an enlarged right side view thereof;

FIG. 5 is an enlarged left side view thereof;

FIG. 6 is an enlarged top view thereof; and,

FIG. 7 is an enlarged bottom view thereof.

Broken lines illustrate portions of the abdomen developing exerciser outside the scope of the claimed design. 

CLAIM The ornamental design for an abdomen developing exerciser, as shown and described. 